Science Final- 7th Grade
DNACell Organelles and their functionsCells to organ systemsGenetics/Probability/Punnett SquaresAbiotic/BioticSuccessionWater Cycle/Carbon CyclePredator/PreyFood Webs/Energy Pyramids
Questions and Answers
- 1.
A natural resource is?
- A.
A resource that is hard to find
- B.
A resource only found in certain parts of nature
- C.
Anything in the environment that is used by people
- D.
Resources that can't be ever replaced
Correct Answer
C. Anything in the environment that is used by peopleExplanation
A natural resource refers to anything in the environment that is utilized by people. This can include various elements such as water, air, minerals, plants, animals, and energy sources like sunlight and wind. Natural resources are essential for human survival and are utilized for various purposes, including food production, energy generation, and manufacturing. They can be found in different parts of nature and may or may not be hard to find, but the key characteristic is that they are utilized by humans.Rate this question:
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- 2.
What is true about the human population?
- A.
It grew rapidly until 1650 AD
- B.
It was 6 billion in 2000 AD
- C.
It grew slowly until 1955 AD
- D.
It was 10 billion in 1000 AD
Correct Answer
B. It was 6 billion in 2000 ADExplanation
The statement that the human population was 6 billion in 2000 AD is true. This can be verified by historical data and population estimates. In the year 2000, the global population was estimated to be around 6 billion, marking a significant increase from previous centuries.Rate this question:
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- 3.
The human population has grown rapidly during the recent centuries. What has caused this?
- A.
Climate and Weather
- B.
Diversity of Niches
- C.
Oil Spills and harming sea animals
- D.
Medicine, Agriculture, and Waste Disposal
Correct Answer
D. Medicine, Agriculture, and Waste DisposalExplanation
The rapid growth of the human population during recent centuries can be attributed to advancements in medicine, agriculture, and waste disposal. The development of medical technologies and practices has significantly reduced mortality rates, allowing more people to survive and reproduce. Improved agricultural techniques have increased food production, ensuring a stable food supply for a growing population. Additionally, proper waste disposal systems have helped prevent the spread of diseases and create healthier living conditions. These factors have collectively contributed to the exponential growth of the human population.Rate this question:
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- 4.
As you know, Tropical Rain Forests are the most Diverse Ecosystem. What is the second most diverse ecosystem?
- A.
Grasslands
- B.
Seaweed
- C.
Coral Reefs
- D.
Cacti
Correct Answer
C. Coral ReefsExplanation
Coral reefs are considered the second most diverse ecosystem after tropical rainforests. Coral reefs are home to a wide variety of marine species and provide habitat for countless organisms. They support a complex web of life and are known for their vibrant colors and unique biodiversity. Coral reefs are crucial for maintaining the health of our oceans and are often referred to as the "rainforests of the sea."Rate this question:
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- 5.
The Purple Marsh Crab is currently on the Threatened Species list. What is happening to this crab?
- A.
It has disappeared from Earth
- B.
It could disappear in the near future
- C.
Its being commonly used as a house-pet
- D.
It could become endangered in the near future
Correct Answer
D. It could become endangered in the near futureExplanation
The correct answer is "It could become endangered in the near future." This suggests that the Purple Marsh Crab is currently not classified as endangered, but there are factors or threats that could potentially lead to its population declining and it becoming endangered in the future. The answer implies that although the crab is not yet endangered, there is concern about its status and the need for conservation efforts to prevent it from reaching that point.Rate this question:
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- 6.
There are many natural events that could cause extinction of a species such as ________ and ________.
- A.
Poaching and Killing
- B.
Volcanos and Earthquakes
- C.
Captive Breeding and Poaching
- D.
None of the Above
Correct Answer
B. Volcanos and EarthquakesExplanation
NATURAL EVENTS!Rate this question:
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- 7.
A(n) ___________ obtains food,water, shelter, and other things it needs to live, grow and reproduce from its environment. (there are more than one answer, check off each answer)
- A.
Organism
- B.
Science Teacher
- C.
Girl named Sarah
- D.
Plant and or Animal
- E.
Nothing
Correct Answer(s)
A. Organism
B. Science Teacher
C. Girl named Sarah
D. Plant and or AnimalExplanation
The correct answers for obtaining food, water, shelter, and other necessities from the environment are organism, plant and/or animal. In the context of the given options, an organism refers to any living entity that can obtain these resources for survival. Both plants and animals are examples of organisms that rely on their environment for their needs. The options "Science Teacher" and "girl named Sarah" are not applicable as they are not entities that obtain resources from the environment for survival.Rate this question:
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- 8.
Abiotic Factors are ___-living parts of a habitat.
- A.
Non
- B.
Re
- C.
Pre
- D.
Over
Correct Answer
A. NonExplanation
Abiotic factors refer to the non-living components of a habitat. These factors include physical and chemical elements such as temperature, sunlight, water, soil composition, and air quality. They play a crucial role in shaping the environment and influencing the living organisms within it. Non-living factors are essential for the survival and functioning of ecosystems, as they provide the necessary conditions for life to exist and thrive.Rate this question:
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- 9.
An example of an abiotic factor is water. However an example of a biotic factor is ___________.
- A.
Oxygen
- B.
Wind
- C.
Fungi
- D.
Rocks
Correct Answer
C. FungiExplanation
Fungi is an example of a biotic factor because it is a living organism that interacts with other organisms in an ecosystem. Biotic factors are living components of an ecosystem that can directly or indirectly affect the organisms within it. Fungi play important roles in decomposition, nutrient cycling, and symbiotic relationships with other organisms. They can also be pathogens or mutualistic partners to plants and animals. Therefore, fungi is a suitable example of a biotic factor in contrast to abiotic factors like water, oxygen, and rocks, which are non-living components of an ecosystem.Rate this question:
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- 10.
When a plant makes food using water, sunlight, and carbon dioxide, they are performing what process?
- A.
Photosynthesis
- B.
Abiotic Factors
- C.
Light Reaction
- D.
None of the Above
Correct Answer
A. PhotosynthesisExplanation
Photosynthesis is the correct answer because it is the process by which plants convert water, sunlight, and carbon dioxide into glucose (food) and oxygen. During photosynthesis, plants use the energy from sunlight to convert carbon dioxide and water into glucose, which they use as a source of energy for growth and development. This process is crucial for the survival of plants and is responsible for the production of oxygen in the atmosphere.Rate this question:
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- 11.
True or False, the level of organization in an ecosystem from smallest unit to largest unit is Organism, Population, Community, Ecosystem
- A.
True
- B.
False
- C.
Maybe
- D.
I don't Know
Correct Answer
A. TrueExplanation
The level of organization in an ecosystem from smallest unit to largest unit is as follows: Organism, Population, Community, Ecosystem. This means that the basic building block of an ecosystem is an individual organism, which then forms a population of the same species. Multiple populations of different species interacting with each other form a community, and all the communities together make up an ecosystem.Rate this question:
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- 12.
Is the example, All of the trees in a forest, an example of a population?
- A.
Yes
- B.
No
- C.
Maybe
- D.
I don't know
Correct Answer
B. NoExplanation
The example "All of the trees in a forest" is not an example of a population because a population refers to a group of individuals of the same species that inhabit a specific area and can interbreed. In this example, the trees in a forest may consist of different species, making it a collection of different populations rather than a single population. Therefore, the answer is no.Rate this question:
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- 13.
True or False; All populations live in the same sized area.
- A.
True
- B.
False
- C.
Maybe
- D.
I don't know
Correct Answer
B. FalseExplanation
The statement "All populations live in the same sized area" is false. Populations can vary in size and can be found in different areas. Populations can be concentrated in specific regions or dispersed across a larger area depending on various factors such as availability of resources, habitat suitability, and migration patterns. Therefore, it is incorrect to assume that all populations live in the same sized area.Rate this question:
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- 14.
True or False; An ecosystem is a group of organisms that are physically similar and can mate and reproduce with each other to produce offspring that can mate and reproduce.
- A.
True
- B.
False
- C.
Maybe
- D.
I don't know
Correct Answer
B. FalseExplanation
An ecosystem is not defined by physical similarity or the ability to mate and reproduce with each other. An ecosystem refers to a community of organisms interacting with each other and their physical environment. It includes both living organisms and their nonliving surroundings. The ability to mate and reproduce is not a defining characteristic of an ecosystem.Rate this question:
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- 15.
Counting the number of red maples in a small area to estimate the number in the entire forest is an example of what type of study to determine population size?
- A.
Direct Observation
- B.
Indirect Observation
- C.
Sampling
- D.
Mark and Recapture Studies
Correct Answer
C. SamplingExplanation
Sampling involves selecting a smaller group or subset of individuals from a larger population and using their characteristics to estimate the characteristics of the entire population. In this case, counting the number of red maples in a small area is a form of sampling because it involves observing a subset of the population (the red maples in the small area) and using that information to estimate the number of red maples in the entire forest.Rate this question:
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- 16.
Counting all of the hawks with and without bands on their legs is an example of what study to determine population size?
- A.
Direct observation
- B.
Indirect observation
- C.
Sampling
- D.
Mark and recapture
Correct Answer
C. SamplingExplanation
Counting all of the hawks with and without bands on their legs is an example of sampling to determine population size. Sampling involves selecting a smaller group from a larger population and using the information gathered from the sample to make inferences about the entire population. In this case, the hawks with and without bands are being counted as a representative sample of the entire hawk population, allowing researchers to estimate the total population size based on the observed proportions.Rate this question:
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- 17.
Counting all of the crabs that live in a tide pool is an example of what study to determine population size?
- A.
Direct observation
- B.
Indirect observation
- C.
Sampling
- D.
Mark and recapture
Correct Answer
A. Direct observationExplanation
Counting all of the crabs that live in a tide pool is an example of direct observation because it involves directly observing and counting the crabs in their natural habitat. This method provides an accurate count of the population size as it involves physically seeing and counting each individual crab. Other methods such as indirect observation, sampling, and mark and recapture involve estimating population size based on a subset of the population or using different techniques, but in this case, direct observation is the most appropriate method.Rate this question:
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- 18.
Counting the number of nesting sites in an area is an example of what study to determine population size?
- A.
Direct Observation
- B.
Indirect Observation
- C.
Sampling
- D.
Mark and Recapture
Correct Answer
B. Indirect ObservationExplanation
Counting the number of nesting sites in an area is an example of indirect observation because it does not involve directly observing and counting individual organisms. Instead, it relies on the assumption that the number of nesting sites is proportional to the population size. By counting the number of nesting sites, researchers can estimate the population size indirectly without having to directly observe and count every individual organism in the area.Rate this question:
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- 19.
Identify the type of relationship for the given example: Bright Yellow Colonial Anemones on a drab Tube Sponge warn fish away from the sponge. The sponge provides space for the anemones.
- A.
Predator-Prey
- B.
Commensalism
- C.
Parasitism
- D.
Mutualism
Correct Answer
D. MutualismExplanation
Predator-Prey (+,-)
Commensalism (+, no effect)
Parasitism (+,-)
Mutualism (+,+)Rate this question:
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- 20.
Identify the type of relationship for the given example: A parrotfish has a strong "beak" that can crunch rock and eat coral polyps.
- A.
Predator-Prey
- B.
Commensalism
- C.
Parasitism
- D.
Mutualism
Correct Answer
A. Predator-PreyExplanation
Predator-Prey (+,-)
Commensalism (+, no effect)
Parasitism (+,-)
Mutualism (+,+)Rate this question:
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- 21.
True or False; In Succession, the changes that occur are predictable
- A.
True
- B.
False
- C.
Maybe
- D.
I don't know
Correct Answer
A. TrueExplanation
In Succession, the changes that occur are predictable. This means that there is a certain pattern or sequence in which the changes happen, and they can be anticipated or foreseen. This predictability may be based on factors such as the natural progression of events or the established order of succession.Rate this question:
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- 22.
The first species to populate the area in primary succession are called ________ species.
- A.
First Class
- B.
Secondary
- C.
Pioneer
- D.
New
Correct Answer
C. PioneerExplanation
Pioneer species are the first species to colonize and populate an area during primary succession. These species are able to tolerate harsh environmental conditions and have the ability to break down rocks and establish soil, creating a suitable habitat for other species to follow. They play a crucial role in initiating the process of ecological succession and paving the way for the establishment of a stable ecosystem.Rate this question:
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- 23.
Choose one of the following animals that COULD NOT survive in a pond ecosystem.
- A.
Frogs
- B.
Lilypads
- C.
Bears
- D.
Fish
Correct Answer
C. BearsExplanation
Bears could not survive in a pond ecosystem because they are terrestrial animals and not adapted to live in water. They do not have the physiological adaptations, such as gills or fins, that enable them to breathe and swim in water. Bears also have a diet that primarily consists of land-based food sources, such as berries, nuts, and meat, which are not readily available in a pond ecosystem. Therefore, bears would not be able to find suitable food or survive in the aquatic environment of a pond.Rate this question:
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- 24.
Which of the following organisms are producers? (check off each one)
- A.
Plants
- B.
Algae
- C.
Bacteria
- D.
Bears
Correct Answer(s)
A. Plants
B. Algae
C. BacteriaExplanation
Plants, algae, and bacteria are producers because they are capable of photosynthesis. They can convert sunlight, water, and carbon dioxide into energy-rich organic compounds, such as glucose, which they use as food. Bears, on the other hand, are not producers as they cannot produce their own food and instead rely on consuming other organisms for energy.Rate this question:
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- 25.
The many overlapping food chains in an ecosystem make up a(n) _________ ______.
- A.
Food Chain
- B.
Food Circle
- C.
Food Web
- D.
Food Pyramid
Correct Answer
C. Food WebExplanation
A food web is a complex network of interconnected food chains that shows the flow of energy and nutrients through an ecosystem. It includes multiple feeding relationships and interactions between different organisms, such as producers, consumers, and decomposers. Unlike a food chain, which represents a linear sequence of organisms, a food web illustrates the complexity and interconnectedness of the ecosystem, highlighting the various pathways through which energy and nutrients are transferred.Rate this question:
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- 26.
In the water cycle, after evaporation occurs, what is the next phase?
- A.
Precipitation
- B.
Ground Water
- C.
Evaporation
- D.
Condensation
Correct Answer
D. CondensationExplanation
After evaporation occurs in the water cycle, the next phase is condensation. This is when water vapor in the air cools down and changes back into liquid form, forming clouds. Condensation is an essential part of the water cycle as it leads to the formation of precipitation, which includes rain, snow, sleet, or hail. Groundwater is a separate phase in the water cycle, where water infiltrates into the ground and becomes stored in underground aquifers.Rate this question:
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- 27.
Which of the following is a form of precipitation? (check off all possible answers!)
- A.
Rain
- B.
Snow
- C.
Sleet
- D.
Hail
Correct Answer(s)
A. Rain
B. Snow
C. Sleet
D. HailExplanation
Rain, snow, sleet, and hail are all forms of precipitation. Precipitation refers to any form of water that falls from the atmosphere to the Earth's surface. Rain occurs when liquid water droplets fall from the clouds, while snow is formed when water vapor freezes into ice crystals in the clouds and then falls to the ground. Sleet is a mixture of rain and ice pellets, and hail is formed when layers of ice build up in a storm cloud and are repeatedly lifted and frozen before falling to the ground.Rate this question:
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- 28.
In the Carbon cycle, if plants give the oxygen to us what do we give to the plants?
- A.
Oxygen
- B.
Nitrogen
- C.
Carbon Dioxide
- D.
H2O
Correct Answer
C. Carbon DioxideExplanation
In the Carbon cycle, plants give us oxygen through the process of photosynthesis. In return, we give carbon dioxide to plants through respiration. This exchange of gases allows for a continuous cycle where plants use carbon dioxide to produce oxygen, which is essential for our survival, while we produce carbon dioxide as a waste product, which is essential for the plants' survival.Rate this question:
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- 29.
A group of land ecosystems with similar climates and organisms is called a _______.
- A.
Grassland
- B.
Habitat
- C.
Ecosystem
- D.
Biome
Correct Answer
D. BiomeExplanation
A biome is a group of land ecosystems with similar climates and organisms. It is a larger-scale classification that encompasses various habitats and ecosystems within it. Biomes are characterized by distinct climate patterns, vegetation types, and animal communities. They provide a framework for understanding and studying the distribution and functioning of ecosystems across the Earth.Rate this question:
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- 30.
True or False, It is mostly the climate conditions in an area that determine its biome.
- A.
True
- B.
False
- C.
Maybe
- D.
I don't know
Correct Answer
B. FalseExplanation
The given answer is False. While climate conditions do play a significant role in determining the characteristics of a biome, they are not the sole determining factor. Other factors such as soil type, topography, and human activities also contribute to the formation and characteristics of a biome. Therefore, it is not mostly the climate conditions in an area that determine its biome.Rate this question:
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- 31.
True or False: If you walked to the top of a mountain you would pass many different biomes.
- A.
True
- B.
False
- C.
Maybe
- D.
I don't Know
Correct Answer
A. TrueExplanation
Walking to the top of a mountain would indeed lead to passing through different biomes. As elevation increases, the climate and vegetation change, resulting in the presence of various biomes. This is known as the vertical zonation of biomes. For example, starting at the base of a mountain, one might encounter a forest biome, then progress through grasslands, alpine tundra, and finally reach a snow-covered biome at the mountain's peak. Therefore, it is true that walking to the top of a mountain would involve passing through multiple biomes.Rate this question:
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- 32.
What organisms are capable of respiration?
- A.
Just Animals
- B.
Just Plants
- C.
Everybody
- D.
Fish
Correct Answer
C. EverybodyExplanation
All organisms need energy.Rate this question:
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- 33.
Check off the bodies of water that are FRESH water.
- A.
Oceans
- B.
RIvers
- C.
Lakes
- D.
Great Salt Lake
Correct Answer(s)
B. RIvers
C. LakesExplanation
Rivers and lakes are bodies of water that contain fresh water. Oceans, on the other hand, contain saltwater. The Great Salt Lake, as the name suggests, contains high levels of salt and is therefore not considered a freshwater body of water.Rate this question:
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- 34.
The ________ zone is the point along the shoreline between the highest high-tide line and the lowest low-tide line.
- A.
Surface
- B.
Intertidal
- C.
Neritic
- D.
Deep
Correct Answer
B. IntertidalExplanation
The intertidal zone refers to the area along the shoreline that is exposed to both high and low tides. It is the region between the highest high-tide line and the lowest low-tide line. This zone is characterized by a wide range of environmental conditions, including exposure to air, sunlight, and water. It is home to a diverse range of organisms that have adapted to survive in this dynamic and challenging habitat.Rate this question:
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- 35.
The point were the fresh water of a river meets the salt water of an ocean is called a(n) __________.
- A.
Zone
- B.
Estuary
- C.
Wave
- D.
Sand
Correct Answer
B. EstuaryExplanation
An estuary is a partially enclosed coastal body of water where freshwater from rivers and streams mixes with saltwater from the ocean. This mixing creates a unique ecosystem that is influenced by both freshwater and marine environments. Estuaries are characterized by fluctuating salinity levels and are often rich in nutrients, making them highly productive and biodiverse areas.Rate this question:
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- 36.
The ______ zone is out in the open ocean where light penetrates only to a depth of a few hundred meters.
- A.
Intertidal
- B.
Neritic
- C.
Surface
- D.
Deep
Correct Answer
C. SurfaceExplanation
The surface zone refers to the top layer of the open ocean where light can penetrate to a depth of only a few hundred meters. This is the zone where most of the photosynthesis and primary productivity occur, as sunlight is available for the growth of phytoplankton and other photosynthetic organisms. Below this zone, light becomes scarce, and the water gets progressively darker and colder.Rate this question:
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- 37.
The _______ zone is a region of shallow water below the low-tide line that extends over the continental shelf.
- A.
Intertidal
- B.
Neritic
- C.
Deep
- D.
Surface
Correct Answer
B. NeriticExplanation
The correct answer is "Neritic." The neritic zone refers to the region of shallow water below the low-tide line that extends over the continental shelf. This zone is characterized by high productivity and diverse marine life due to the availability of sunlight and nutrients. It is an important habitat for many species and supports commercial fishing activities.Rate this question:
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- 38.
The _____ zone is almost completely dark.
- A.
Intertidal
- B.
Neritic
- C.
Deep
- D.
Surface
Correct Answer
C. DeepExplanation
The deep zone refers to the region of the ocean that is located below the sunlight zone and is characterized by its extreme darkness. This zone is located below approximately 200 meters and receives very little to no sunlight, resulting in a lack of photosynthetic activity. As a result, organisms in this zone have adapted to survive in conditions of high pressure, low temperatures, and limited food availability. The darkness in the deep zone is due to the lack of sunlight penetration, making it almost completely dark.Rate this question:
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- 39.
All of the living and non-living things in an area is an _________.
- A.
Ecosystem
- B.
Community
- C.
Habitat
- D.
Population
Correct Answer
A. EcosystemExplanation
An ecosystem refers to the interaction between living and non-living things in a specific area. It includes all the plants, animals, and microorganisms, as well as the physical environment such as soil, water, and air. The organisms in an ecosystem are interconnected and depend on each other for survival. They also interact with the abiotic factors to form a complex and balanced system. Therefore, an ecosystem is the correct answer as it encompasses all the components and their interactions within a specific area.Rate this question:
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- 40.
True or False: The warmer and more rainfall an area gets the more diverse the organisms.
- A.
True
- B.
False
- C.
Maybe
- D.
I don't know
Correct Answer
A. TrueExplanation
Warmer temperatures and higher rainfall can create more favorable conditions for the growth and survival of different types of organisms. This can lead to increased biodiversity as more species are able to thrive in such environments. The availability of resources and habitats in areas with warmer temperatures and more rainfall can support a greater variety of organisms, including plants, animals, and microorganisms. Therefore, it is true that the warmer and more rainfall an area gets, the more diverse the organisms are likely to be.Rate this question:
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